A typical 1x set up has around 15-20% less overall range than a 2x, the 1x will introduce more
friction though due to the chain not running as straight all the time.
While you are correct in what you're saying, the reality it's not as black and white as that.
Yes a 2x will have more range then a 1x simply because of a doubling of the gear ratios from using two different sized chainrings
But if you use the OPs examples, the 1x system on the Canyon has the same top gear ratio but also has a lower low gear ratio then the Trek
So the Canyon actually has a bigger range but uses less gear ratios to achieve this than the trek
The thinking for many years was to get more gears on a bike, the more gears you had the more choice you have to find the right gear for the situation you find yourself in. That thinking has changed slightly now as more and more bikes are coming with 1x systems now, even the Trek the OP was referring to has now switched to a 1x system for 2023, mountain bikes that used to come with up to 30 gears are now nearly all on a 1x systems and the reason for this is simply you generally can get enough gear range between high and low on a 1x system now for all your biking requirements
The problem I have with the "friction" test is two fold, one the test is more of a Shimano vs Sram rather than a 1x vs 2x system. The actual test the author refers to even states the the build quality of Sram chains is not as good a Shimano and secondly its very much dependant on how a person uses their gears and maintains their drivetrain, if they are mainly using the outer gears more then yes the wear and tear will be greater on both systems and slightly more so on the 1x, but I'm not even sure a everyday cyclist would notice the difference in wear rates
I was always of the opinion that you should always be using the middle gears of the rear cassette for the majority of your cycling, if that is not the case then I would suggest that the gearing your using is wrong for the type of cycling you're doing and needs to be looked at
Bleeding hydraulic brakes is an easy enough DIY job if you like that kind of thing
I agree that most of the servicing of bikes can be done at home but only if you have the right tools and know what you are doing
and I certainly wouldn't advise trying to bleeding disc brakes unless you are sure of what you're doing